EP1468432B1 - Linear-schwingspulenbetätigungsglied mit planarspulen - Google Patents

Linear-schwingspulenbetätigungsglied mit planarspulen Download PDF

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Publication number
EP1468432B1
EP1468432B1 EP02806478A EP02806478A EP1468432B1 EP 1468432 B1 EP1468432 B1 EP 1468432B1 EP 02806478 A EP02806478 A EP 02806478A EP 02806478 A EP02806478 A EP 02806478A EP 1468432 B1 EP1468432 B1 EP 1468432B1
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EP
European Patent Office
Prior art keywords
field
magnets
subassemblies
motion
voice coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02806478A
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English (en)
French (fr)
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EP1468432A1 (de
Inventor
Mikhail Godkin
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Custom Sensors and Technologies Inc
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Custom Sensors and Technologies Inc
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Publication date
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Publication of EP1468432A1 publication Critical patent/EP1468432A1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/066—Electromagnets with movable winding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection

Definitions

  • the present invention is generally directed to linear voice coil actuators, and in particular to a linear voice coil actuator with planar coils.
  • a field assembly of such an actuator consists of a plurality of magnets of alternating polarity and of the same or different widths in the direction of motion that are attached to the field blanks (return paths), and a plurality of individual coils located in the cavities between the magnets.
  • a disadvantage of the above design is that the height of the resulting actuator is large.
  • the magnets of alternating polarity can have the same or different widths in the direction of motion, and the magnets may be spaced apart or in contact with one another.
  • the field blanks may further include flux path sections positioned to provide, for each of the magnets of the first one of the plurality of field subassemblies and a corresponding portion of a field blank of another one of the plurality of field subassemblies positioned across the gap from the magnet, a flux path through the field blanks perpendicular to the direction of motion of the linear voice coil actuator.
  • first and second ones of the plurality of field subassemblies each include the plurality of magnets of alternating polarities, so that pairs of magnets of opposite polarity from the first and second ones of the plurality of subassemblies are separated by the gap, and further wherein the field blanks further include flux path sections positioned to provide, for each of the pairs of magnets of opposite polarity that are separated by the gap, a flux path through the field blanks perpendicular to the direction of motion of the linear voice coil actuator.
  • the above structure can provide an actuator having a substantially reduced height.
  • the linear voice coil actuator 10 of the subject application includes two field subassemblies 12, 14, and a coil assembly 16 with a position sensor 18. It is analogous to an actuator described in the above referenced US Patent No. 4,808,955 , incorporated herein by reference, but differs in at least the following two aspects:
  • only one of the field subassemblies, 12 or 14 needs to have any magnets.
  • the permanent magnets would be positioned on only one side of the coils 20.
  • one embodiment of the invention is directed to a linear voice coil actuator including a plurality of field subassemblies, and a coil assembly.
  • the plurality of field subassemblies each comprise a field blank, and at least one of the plurality of field subassemblies also includes a plurality of magnets of alternating polarity and of the same or different widths in the direction of motion, wherein the magnets may be spaced apart or in contact with one another and are positioned on the field blank to form interleaved-magnetic circuits in a direction of motion of the linear voice coil actuator.
  • the plurality of field subassemblies are positioned with respect to one another to form a gap between the at least one of the plurality of field subassemblies which includes the plurality of magnets, and another of the plurality of field subassemblies.
  • the coil assembly of this embodiment includes coils that are positioned in the same plane within the gap, wherein the plane is substantially parallel to the direction of motion of the linear voice coil actuator.
  • a linear voice coil actuator including a plurality of field subassemblies, and a coil assembly.
  • the plurality of field subassemblies each comprise a field blank, and at least one of the plurality of field subassemblies also includes a plurality of magnets of alternating polarity and of the same or different widths in the direction of motion, wherein the magnets may be spaced apart or in contact with one another and are positioned on the field blank to form interleaved-magnetic circuits in a direction of motion of the linear voice coil actuator.
  • the plurality of field subassemblies are positioned with respect to one another to form a gap between the at least one of the plurality of field subassemblies which includes the plurality of magnets, and another of the plurality of field subassemblies.
  • the field blanks in this embodiment further include flux path sections 30 which provide a flux path perpendicular to the direction of motion for each pair of magnets of opposite polarity that are separated by the gap.
  • the field blanks of each of the plurality of field subassemblies comprise a generally planar portion, and the flux path sections extend above the planar portion and along the direction of motion.
  • the flux path sections of the first and second field subassemblies are positioned in contact with or adjacent one another.
  • the provided perpendicular flux path is formed through a magnet of the first field subassembly, across the gap to a magnet of opposite polarity (if any) of the second field subassembly, through the planar portion and then one of the flux path sections of the field blank of the second field subassembly, through the adjacent flux path section and then the planar portion of the first field subassembly, and back to the magnet of the first field subassembly.
  • the linear voice coil actuator includes a first field subassembly 12 and a second field subassembly 14 which are juxtaposed one another. Positioned between field subassemblies 12 and 14 is a coil assembly 16 that moves along a direction of motion 19. Also shown in Fig. 1 , positioned in slots 40 and 42 formed in a portion of the coil assembly 16, is a position sensor 18 and wires 44 for communicating with position sensor 18, as well as wires 46 for communicating with the coils of the coil assembly 16. As can be seen from Fig.
  • field subassemblies 12 and 14 have an exterior portion which is generally rectangular in shape, with opposing edges which are shaped to provide an apertures 48 for movement of coil assembly 16 relative to the field subassemblies 12 and 14.
  • Linear bearings or slides (not shown) can be positioned in or around apertures 48 to support movement of the coil assembly 16.
  • Fig. 2 provides an illustration of the interior portions of field subassemblies 12 and 14, each of which includes a field blank 28 and permanent magnets 22.
  • the permanent magnets 22 are positioned in a recessed area formed in the interior face of the field blank 28.
  • these flux path sections 30 provide a flux path 24 (illustrated in Fig. 5 ) perpendicular to the direction of motion 19 of the linear actuator.
  • the thickness of the field blanks 28 flux path sections 30 is greater than that along the edges which are transverse to the direction of motion 19 of the linear actuator. This results in the formation of apertures 48 when the field subassemblies 12 and 14 are assembled together.
  • both field subassemblies include magnets 22.
  • other embodiments of the linear actuator of the present invention can employ magnets 22 in only one of the field subassemblies.
  • the magnets 22 are positioned in a row in each of field subassemblies 12 and 14 to have alternating polarities to form interleaved-magnetic circuits in the direction of motion of the linear voice coil actuator.
  • the polarity sequence is N-S-N.
  • the polarity sequence is S-N-S.
  • a magnet 22 of "N" polarity from field subassembly 12 is paired with a magnet of "S" polarity from field subassembly 14; then a magnet of "S” polarity is paired with a magnet of "N” polarity; and finally a magnet of "N” polarity from field subassembly 12 is paired with a magnet of "S” polarity, all across gap 26.
  • the magnets 22 of this embodiment have different widths.
  • the center magnet has the largest width. The same is true for the center magnet of the three magnets of field subassembly 14.
  • each of the magnets in each of the field subassemblies is shown to be touching a neighboring magnet, it is contemplated that these magnets may also be spaced apart from one another within the scope of the present invention. It will also be appreciated by one skilled in the art that the width ratios between the magnets illustrated in the figures are but one embodiment of the present invention, and that other ratios may be selected depending upon the force-stroke profile desired for the actuator. Further, while three magnets 22 are shown in a row in each field subassembly, other numbers of magnets can be used to form the interleaved-magnetic circuits of the present invention, as will be appreciated by those skilled in the art.
  • Coil assembly 16 includes a support structure 50 having a coil supporting section 50 and support extensions 52 and 54 formed at opposite ends of the coil supporting section 50. Slots 40 and 42 are formed in support extension 52 for routing wires 44 and 46 to position sensor 18 and to coils 20, respectively.
  • Coils 20 are planar in shape and preferably are positioned in a recessed area 56 formed in supporting section 50. As can be seen from Fig. 3 , the thickness of planar coils 20 is approximately equal to the depth of the recessed area 56. Coils 20 can be bonded to support structure 50 or completely encapsulated within recessed area 56.
  • Fig. 4 is an exploded view of linear actuator 10, illustrating the relative position of coils 20 with respect to magnets 22.
  • each field subassembly 12 and 14 has a trio of magnets 22 of alternating polarity.
  • the center magnet 22 of each trio of magnets has a width greater than the two magnets to either side.
  • the coil assembly 16 has two coils 20 of similar widths. In the embodiment of Fig. 4 , the widths of coils 20 are similar to the width of the center magnet of the trio of magnets.
  • FIG. 5 a cross section of the linear actuator is shown taken along lines 5-5 of Fig. 1 .
  • Fig. 5 shows a cross section which is transverse to the direction of motion 19 of the linear actuator 10.
  • the polarity of the magnet 22 of field subassembly 14 is "S” while the polarity of the magnet 22 of field subassembly 12 is "N”, so that a pair of magnets of opposite polarities are provided, separated by gap 26 is located between the pair of magnets.
  • Fig. 5 Also to be noted in Fig. 5 is that the flux path sections 30 of the field subassemblies 12 and 14 are positioned with respect to one another to provide flux paths indicated by arrows 24. These flux paths 24 are transverse to the direction of motion of the linear actuator 10. A notable benefit of these flux path sections is that they result in a device with a height that is largely independent of the length of the magnets used. Thus, if the stroke of the actuator were desired to be increased, a commensurate increase in the height of the actuator would not be required, as would typically be the case with conventional actuator structures such as those shown in Figs. 6 and 7 .
  • only one of the field subassemblies includes magnets 22.
  • the other field subassembly would include a field blank 28 having flux path sections 30, but without the recessed area in the interior face of the field blank 28.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Linear Motors (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Claims (8)

  1. Linear-Schwingspulenbetätigungsglied (10), das Folgendes einschließt:
    einen Spulensatz (16), der eine Bewegungsrichtung (19) hat,
    mehrere Feld-Unterbaugruppen (12, 14), die jeweils eine Feldplatine (28) umfassen, wobei wenigstens eine erste (14) der mehreren Feld-Unterbaugruppen mehrere Magnete (22) mit abwechselnder Polarität einschließt, die auf der Feldplatine (28) angeordnet sind, um überlappte Magnetkreise in der Bewegungsrichtung (19) zu bilden, wobei jeder der mehreren Magnete (22) entgegengesetzte Enden hat und wobei ferner die Feld-Unterbaugruppen (12, 14) in Bezug aufeinander so angeordnet sind, dass sie einen Spalt (26) zwischen der ersten (14) der mehreren Feld-Unterbaugruppen, welche die mehreren Magnete (22) einschließt, und einer anderen (12) der mehreren Feld-Unterbaugruppen bilden und dass sie an den entgegengesetzten Enden der Magnete einen querlaufenden Feldlinienpfad (24) durch die Feldplatinen (28) in einer Richtung, quer zu der Bewegungsrichtung (19), bereitstellen,
    wobei der Spulensatz (16) Spulen (20) einschließt, die in einer Ebene innerhalb des Spalts (26) angeordnet sind, wobei die Ebene im Wesentlichen parallel zu der Bewegungsrichtung (19) ist,
    und wobei die mehreren Magnete (22) in Richtungen, senkrecht zu der Bewegungsrichtung (19), magnetisiert sind.
  2. Linear-Schwingspulenbetätigungsglied nach Anspruch 1, wobei die mehreren Magnete (22) in der Bewegungsrichtung (19) die gleichen Breiten haben.
  3. Linear-Schwingspulenbetätigungsglied nach Anspruch 1, wobei die mehreren Magnete (22) in der Bewegungsrichtung (19) unterschiedliche Breiten haben.
  4. Linear-Schwingspulenbetätigungsglied nach Anspruch 1, 2 oder 3, wobei die Magnete mit Zwischenraum entfernt in Bezug aufeinander angeordnet sind.
  5. Linear-Schwingspulenbetätigungsglied nach einem der vorhergehenden Ansprüche, wobei die mehreren Magnete (22) in Berührung miteinander sind.
  6. Linear-Schwingspulenbetätigungsglied nach Anspruch 1, wobei die Feldplatinen (28) ferner Feldlinienpfadsektionen (30) einschließen, die so angeordnet sind, dass sie für jeden der mehreren Magnete (22) der ersten (14) der mehreren Feld-Unterbaugruppen und einen entsprechenden Abschnitt einer Feldplatine (28) einer anderen (12) der mehreren Feld-Unterbaugruppen, die über den Spalt (26) von dem Magnet angeordnet sind, den querlaufenden Feldlinienpfad (24) durch die Feldplatinen (28) in der Ebene, quer zu der Bewegungsrichtung (19), bereitstellen.
  7. Linear-Schwingspulenbetätigungsglied nach Anspruch 1, wobei eine zweite (12) der mehreren Feld-Unterbaugruppen mehrere Magnete (22) mit abwechselnder Polarität einschließt, die auf der Feldplatine (28) angeordnet sind, um überlappte Magnetkreise in einer Bewegungsrichtung (19) zu bilden, so dass Paare von Magneten mit entgegengesetzter Polarität von der ersten und der zweiten (12, 14) der mehreren Feld-Unterbaugruppen durch den Spalt (26) getrennt sind, und wobei ferner die Feldplatinen (28) ferner Feldlinienpfadsektionen (30) einschließen, die so angeordnet sind, dass sie für jedes der Paare von Magneten mit entgegengesetzter Polarität, die durch den Spalt (26) getrennt sind, den querlaufenden Feldlinienpfad (24) durch die Feldplatinen (28) in der Ebene, quer zu der Bewegungsrichtung (19), bereitstellen.
  8. Linear-Schwingspulenbetätigungsglied nach Anspruch 6 oder 7, wobei jede der Feldplatinen (28) einen im Allgemeinen ebenen Abschnitt umfasst und sich die Feldlinienpfadsektionen (30) über den ebenen Abschnitt hinaus und längs des ebenen Abschnitts in der Bewegungsrichtung (19) erstrecken und wobei die Feldlinienpfadsektionen (30) der ersten (14) und der anderen (12) der mehreren Feld-Unterbaugruppen in Berührung miteinander oder angrenzend aneinander angeordnet sind, so dass der querlaufende Feldlinienpfad (24) durch einen Magnet (22) der ersten (14) der mehreren Feld-Unterbaugruppen, über den Spalt (26) zu einem entsprechenden Abschnitt der anderen (12) der mehreren Feld-Unterbaugruppen, durch den ebenen Abschnitt der anderen (12) der mehreren Feld-Unterbaugruppen, durch eine der Feldlinienpfadsektionen (30) der Feldplatine (28) der anderen der mehreren Feld-Unterbaugruppen, durch die angrenzende Feldlinienpfadsektion (30) und danach durch den ebenen Abschnitt der ersten (14) der mehreren Feld-Unterbaugruppen und zurück zu dem Magnet (22) der ersten (14) der mehreren Feld-Unterbaugruppen gebildet wird.
EP02806478A 2001-12-21 2002-12-20 Linear-schwingspulenbetätigungsglied mit planarspulen Expired - Lifetime EP1468432B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US34348801P 2001-12-21 2001-12-21
US343488P 2001-12-21
PCT/US2002/040796 WO2003060931A1 (en) 2001-12-21 2002-12-20 Linear voice coil actuator with planar coils

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EP1468432A1 EP1468432A1 (de) 2004-10-20
EP1468432B1 true EP1468432B1 (de) 2010-06-30

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US (1) US6787943B2 (de)
EP (1) EP1468432B1 (de)
JP (1) JP2005515741A (de)
KR (1) KR20040101194A (de)
CN (1) CN100375206C (de)
AT (1) ATE472808T1 (de)
DE (1) DE60236895D1 (de)
WO (1) WO2003060931A1 (de)

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JP5140103B2 (ja) * 2010-03-17 2013-02-06 株式会社日立ハイテクノロジーズ リニアモータ対、移動ステージ、及び電子顕微鏡
KR101132948B1 (ko) 2010-05-13 2012-04-05 엘에스산전 주식회사 전기자동차 충방전 시스템, 충방전 장치, 충방전 방법
CN102946162A (zh) * 2011-08-16 2013-02-27 大银微系统股份有限公司 线性马达的定子基座
CN103731002B (zh) * 2014-01-21 2017-04-19 清华大学 音圈电机
CN103915971B (zh) * 2014-04-14 2016-01-06 南京航空航天大学 具有多气隙独立绕组结构的三维磁通永磁直线电机
US9130445B1 (en) 2014-08-04 2015-09-08 David Micah Katz Electromechanical transducer with non-circular voice coil
ES2882288T3 (es) * 2017-03-09 2021-12-01 Behr Hella Thermocontrol Gmbh Actuador electromagnético para una unidad de realimentación mecánica
EP3567708B1 (de) * 2018-05-09 2022-03-09 Etel S.A. Sekundärteil für einen eisenlosen linearmotor
CN111082630B (zh) * 2019-12-19 2021-03-30 歌尔股份有限公司 一种振动装置
US11716003B1 (en) * 2022-03-08 2023-08-01 The United States Of America, As Represented By The Secretary Of The Navy Electromagnetic arrays
CN221305610U (zh) * 2023-11-03 2024-07-09 湖北省钻马智控科技有限公司 一种振动马达

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Also Published As

Publication number Publication date
CN1620705A (zh) 2005-05-25
JP2005515741A (ja) 2005-05-26
EP1468432A1 (de) 2004-10-20
ATE472808T1 (de) 2010-07-15
KR20040101194A (ko) 2004-12-02
US6787943B2 (en) 2004-09-07
CN100375206C (zh) 2008-03-12
DE60236895D1 (de) 2010-08-12
US20030127916A1 (en) 2003-07-10
WO2003060931A1 (en) 2003-07-24

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